An eagle-eyed driver has been credited with helping crack the case last week after he spotted a suspicious suitcase being loaded onto his bus as he prepared to drive from Paris to the airport, a hub for low-cost airlines.
Acting on his tip-off about a large brown bag that appeared to be moving on its own, police at Beauvais pounced on a Romanian man who picked up the suitcase and a smaller black rucksack as he arrived.
After arresting him, detectives found an accomplice hidden inside the case who, once alone in the baggage hold during the trip, would pull a strap to unzip himself and then begin his thieving.
"In the black bag we found two laptops, money and various objects of value," French news agecny AFP reported.
Both men, aged around 40, were from Romania and had criminal records for theft.
The man inside the suitcase received an eight-month prison sentence on Monday when he appeared in court, while the other man was given a one-year prison sentence because of his more serious criminal record, prosecutor Florent Boura said.